Dynamo-electric machine.



E, MATTMAN.

DYNAMO ELECTRIC MACHINE.

APELIOATION FILED JAIL so, lu'ru.

Patented Aug. 17, 1909.

PATEN T OFFICE.

EMIL MATTMAN, OF MILWAUKEE, WISCONSIN,

ASSIGXOR TO ALLIS-CHALMERS COMPANY; A

CORPORATIOA OF NEW JERSEY.

DYNAMO-ELEGTRIC MACHINE.

Specification of Letters- Patent.

Patented Aug. 17, 1909.

Application filed January 30, 1909. Serial No. 475,251.

T 0 all whom it may concern:

Be it known that I. EiriL ltla'rriias, a citizen of Switzerland, residing at fililwaukee,

in the county of Milwaukee and State of .l'isconsin, have i11ve1'1ted' certain new and f useful Improvements in Dynamo-Electnc Machines. of wlnch the following is a full,

cleaigand exact specification.

My invention relates to dynamo-electric g nuichiucs and more specifically to means for cooling the armatures and commutators of such 111acl1ines.

Revolving armatures and commutators, especlally on lngh speed machines, tend to be- 5 come excessively heated, thereby materially reducing the capacity and shortening the life of the dynamo-electric machine.

it is the object of my present invention to provide means for cooling the armatures and commutators of such machines. This is accomplished by a novel arrangement of the commutator leads'which connect the commutator se 'ments and armature winding, these leads )eing so arranged that they actvanes to cause an axial flow of air.

The novel combination ofparts and details of construction which comprise my invention will be hereinafter fully described and specifically pointed out in the appended claims.

In the accompanying drawings, Figure 1 is a longitudinal sectional view of a portion of the rotating member of a dynamo-electric machine embodving my present invention.

showing the angular arrangement. of the same relative to the axis of rotation. I

Referring first to the arrangement shown in Figs. 1, 2, and 3, a spider 11 provided with openings 30 is mounted on a shaft 10. An armature core 12 carrying a winding 13 is mounted on the spider 11, and is clamped between end-rings 14, one or both of which 1 are provided with integral supporting arms 1 15. By means of bolts 16 and the rings 11, the core lam-inat-ions or disks 11', are fastened and tightly clamped. Ventilating openings l 31 are formed between the core disks 17. y The arms 15 support a ring 18 which is slotted to receive the end portions 19 of the armature winding. After the end portions 1 19 of the armature winding are set in slots 20 of the ring 18. they are tightly held by l meansof wedges 21. A frame 22 carrying a commutator 23 consisting of a plurality of segments, is mounted on the shaft 10 inany desired manner. Commutator leads 21, which are a combination of fan-blades and 1 leads and made preferably flat, connect the I commutator segments and armature windto the end portions of the armature winding in any desired manner, but are skewed so that the planes of said commutator leads make an angle with the axis of rotation. K Because they are thus skewed, the commultator leads act as' fan-blades to cause an I axial as well as a centrifugal How of air, thus greatly augmenting the fan-action and developing large currents of circulating air for cooling the armature and commutator. The slots 25 in the commutator segments, the outer ends of the end portions 19 of the armature winding, and the commu' tator leads are all disposed atthe same angle to the axis of rotation. The leads and bars are held firmly together by means of rivets 26. A modification of the above invention is illustrated in Figs. 1 and 5. In this case, instead of having the entire length of the collector leads 2? at an angle with the axis of rotation, only the central portions thereof are so skewed. The end portions 29 and 29. where they are joined to the end portions of the armature winding and to the commutator segments respectively, are not skewed. The shaft 32 is provided with slots 33 which communicate with ventilating openings 34 formed by spacing apart groups of the core laminat-ions or disks.

Due to the fan-like action of the collector leads, currents of air are drawn across the commutator, forced between adjacent collector leads and rush on, circulating through the interior of the armature structure. Many modifications may be made in the arrangements specifically shown and described, andI aim in the appended claims to cover all such modifications which do not fiat commutator leads connecting said winding and said segments, the planes of said mature skewed fiat commutator leads connecting.

leads making an angle with the axis of rotation'. I

2 in the rotary member of a dynamo electric machine,.the combination of an armaturewinding, commutator segments, and flat commutator leads connecting said armature winding and said segments, the planes of portions of said leads being oblique to the axis of rotation.

3. In the rotary member of a dynamoelectric machine, the combination, of an arwinding, commutator segments,

said winding and said segments, and means for fastening said leads and said segments togetheri ft. The rotary member of a dynamo-electrlc machine, comprising a commutator, an

' armature, and means for causing the cooling of said commutator and said armature, said means COIHPIISlIIg' skewed commutator leads.

5. In the rotary member of a dynamoelectric machine, the combination of anarmature winding, commutator segments and commutator leads connecting said winding andsaid segments and so skewed that they act as fan-blades to cause an axial flow of air.

Milwaukee, Wis, J an. 19, 1909.

In testimony whereof I afiix my signature,

in the presence of two witnesses.

" EMIL MATTMAN.

\Vitnesses H- 0- CASE, CHAS. L. BYRON. 

